books
- Light and matter -- introductory physics for students majoring in the life sciences
- Mechanics
- Fields and circuits
- Modern physics
- Conceptual physics
- Problems in introductory physics
- Fundamentals of calculus
- Relativity for poets
- Special relativity
- General relativity
- Simple nature -- physics for scientists and engineers, with a nontraditional order of topics
open-source software
- Spotter - a program that lets students check their answers to math and science questions
- OpenGrade - software for teachers to keep track of grades
- When - an extremely simple personal calendar program, aimed at the Unix geek who wants something minimalistic